Looks like this is an old, dead thread, but I had to chime in.
I was searching the forum for information because I have a TM751 and KR19A, and THEY DON'T WORK WHEN IT'S COLD!
I have the transceiver mounted in an unheated garage. Its sole function is to turn on/off some exterior lights as I come and go. In mild weather, the range between the two is unimpressive, but acceptable. As the weather cooled this winter the range shrank. At 20 degrees, I could activate the transceiver by standing right beside it and pushing the button on the remote, however, it made a rather loud click. At 10 degrees and below, it wouldn't work at all.
Is there something I've overlooked in getting this to work, or should I send this stuff back to X10? It baffles me, in an era of garage door remotes that work in all weather from 150 feet, that X10 can't make a remote and transceiver that work better than this.
Thanks,
randyc4053